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Roof Control of Stress-relief Jointing Near Outcrops in Central Appalachian Drift Coal Mines
Gary P. Sames
Noel N. Moebs
出版
U.S. Department of the Interior, Bureau of Mines
, 1992
URL
http://books.google.com.hk/books?id=Xjh71WyOhvYC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN
